feat: add readme
This commit is contained in:
parent
6fe39b6c61
commit
ef924fb073
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@ -0,0 +1,6 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="VcsDirectoryMappings">
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<mapping directory="$PROJECT_DIR$" vcs="Git" />
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</component>
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</project>
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7
Makefile
7
Makefile
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@ -32,10 +32,5 @@ gen-api: # 產生 api
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.PHONY: mock-gen
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mock-gen: # 建立 mock 資料
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mockgen -source=./internal/module/product/domain/repository/category.go -destination=./internal/module/product/mock/repository/category.go -package=mock
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mockgen -source=./internal/module/product/domain/repository/supplementary_info.go -destination=./internal/module/product/mock/repository/supplementary_info.go -package=mock
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mockgen -source=./internal/module/product/domain/repository/product.go -destination=./internal/module/product/mock/repository/product.go -package=mock
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mockgen -source=./internal/module/product/domain/repository/tags.go -destination=./internal/module/product/mock/repository/tags.go -package=mock
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mockgen -source=./internal/module/product/domain/repository/product_item.go -destination=./internal/module/product/mock/repository/product_item.go -package=mock
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mockgen -source=./internal/module/cart/domain/repository/cart.go -destination=./internal/module/cart/mock/repository/cart.go -package=mock
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mockgen -source=./internal/module/url/repository/url.go -destination=./internal/module/url//mock/repository/url.go -package=mock
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@echo "Generate mock files successfully"
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@ -0,0 +1,47 @@
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###########
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# BUILDER #
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###########
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FROM golang:1.22.3 as builder
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ARG VERSION
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ARG BUILT
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ARG GIT_COMMIT
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ARG SSH_PRV_KEY
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# private go packages
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ENV GOPRIVATE=code.30cm.net
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ENV FLAG="-s -w -X main.Version=${VERSION} -X main.Built=${BUILT} -X main.GitCommit=${GIT_COMMIT}"
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WORKDIR /app
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COPY . .
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RUN apt-get update && \
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apt-get install git
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# Make the root foler for our ssh
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RUN mkdir -p /root/.ssh && \
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chmod 0700 /root/.ssh && \
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ssh-keyscan git.30cm.net > /root/.ssh/known_hosts && \
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echo "$SSH_PRV_KEY" > /root/.ssh/id_rsa && \
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chmod 600 /root/.ssh/id_rsa
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RUN --mount=type=ssh go mod download
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RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
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-ldflags "$FLAG" \
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-o url
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##########
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## FINAL #
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##########
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#
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FROM gcr.io/distroless/static-debian11
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WORKDIR /app
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COPY --from=builder /app/url /app/url
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COPY --from=builder /app/etc/url.yaml /app/etc/url.yaml
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EXPOSE 8888
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CMD ["/app/url"]
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@ -0,0 +1,31 @@
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version: "3.9"
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services:
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app:
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build:
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context: . # 當前目錄為構建上下文
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dockerfile: ./build/Dockerfile
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environment:
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- VERSION=1.0.0
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- BUILT=$(date +%Y-%m-%d)
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- GIT_COMMIT=$(git rev-parse --short HEAD)
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- SSH_PRV_KEY=${SSH_PRV_KEY} # 傳遞私鑰,用於私有倉庫
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ports:
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- "8888:8888"
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depends_on:
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- mongo
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- redis
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volumes:
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- ./etc:/app/etc
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mongo:
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image: mongo:8.0
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container_name: mongo
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ports:
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- "27017:27017"
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redis:
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image: redis:7.0
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container_name: redis
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ports:
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- "6379:6379"
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@ -7,8 +7,8 @@ Cache:
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type: node
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Mongo:
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Schema:
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Host:
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Schema: mongodb
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Host: "127.0.0.1:27017"
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User:
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Password:
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Database: digimon_url
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@ -0,0 +1,10 @@
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// Code generated by MockGen. DO NOT EDIT.
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// Source: ./internal/module/url/repository/url.go
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//
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// Generated by this command:
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//
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// mockgen -source=./internal/module/url/repository/url.go -destination=./internal/module/url//mock/repository/url.go -package=mock
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//
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// Package mock is a generated GoMock package.
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package mock
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@ -173,8 +173,3 @@ func (repo *URLRepository) Index20241226001UP(ctx context.Context) (*mongo.Curso
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return repo.DB.GetClient().Indexes().List(ctx)
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}
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// ptr 是一個幫助函數,用於生成指針
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func ptr[T any](v T) *T {
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return &v
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}
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@ -3,6 +3,7 @@ package repository
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import (
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mgo "code.30cm.net/digimon/library-go/mongo"
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"context"
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"fmt"
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"github.com/alicebob/miniredis/v2"
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"github.com/stretchr/testify/assert"
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"github.com/zeromicro/go-zero/core/stores/cache"
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@ -22,8 +23,7 @@ func SetupTestURLRepository(db string) (repository.URLRepository, func(), error)
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conf := &mgo.Conf{
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Schema: "mongodb",
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Host: h,
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Port: p,
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Host: fmt.Sprintf("%s:%s", h, p),
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Database: db,
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MaxStaleness: 300,
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MaxPoolSize: 100,
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}
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param := URLRepositoryParam{
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conf: conf,
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cacheConf: cacheConf,
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cacheOpts: cacheOpts,
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Conf: conf,
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CacheConf: cacheConf,
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CacheOpts: cacheOpts,
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}
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repo := NewURLRepository(param)
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return repo, tearDown, nil
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}
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func TestAccountModel_Insert(t *testing.T) {
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func TestAccountModel_InsertMany(t *testing.T) {
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repo, tearDown, err := SetupTestURLRepository("testDB")
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defer tearDown()
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assert.NoError(t, err)
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{
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name: "Valid account insert",
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account: &entity.URLTable{
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ShortCode: "123",
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ShortCode: "AAAAA",
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URL: "https://www.google.com",
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},
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expectError: false,
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assert.Error(t, err)
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} else {
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assert.NoError(t, err, "插入操作應該成功")
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//// 檢查是否生成了 ObjectID 和時間戳
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//assert.NotZero(t, tt.account.ID, "ID 應該被生成")
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//assert.NotNil(t, tt.account.CreateAt, "CreateAt 應該被設置")
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//assert.NotNil(t, tt.account.UpdateAt, "UpdateAt 應該被設置")
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//
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//// 檢查插入的時間是否合理
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//now := time.Now().UTC().UnixNano()
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//assert.LessOrEqual(t, *tt.account.CreateAt, now, "CreateAt 應在當前時間之前")
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//assert.LessOrEqual(t, *tt.account.UpdateAt, now, "UpdateAt 應在當前時間之前")
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//
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//// 確認插入的資料
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//insertedAccount, err := repo.FindOne(context.Background(), tt.account.ID.Hex())
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//assert.NoError(t, err, "應該可以找到插入的帳號資料")
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//assert.Equal(t, tt.account.LoginID, insertedAccount.LoginID, "LoginID 應相同")
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//assert.Equal(t, tt.account.Token, insertedAccount.Token, "Token 應相同")
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//assert.Equal(t, tt.account.Platform, insertedAccount.Platform, "Platform 應相同")
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one, err := repo.FindOne(context.Background(), tt.account.ShortCode)
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assert.NoError(t, err)
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assert.Equal(t, one.ShortCode, tt.account.ShortCode)
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assert.Equal(t, one.URL, tt.account.URL)
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}
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})
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}
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@ -48,6 +48,7 @@ func (alloc *IDAllocator) Release(id string) error {
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// 將對應位設置為 0
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alloc.bitmap.SetBit(alloc.bitmap, index, 0)
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return nil
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}
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package usecase
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import (
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"github.com/stretchr/testify/assert"
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"testing"
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)
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func TestIDAllocator(t *testing.T) {
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allocator := NewIDAllocator()
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// 測試分配 ID
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t.Run("Allocate IDs", func(t *testing.T) {
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id1, err := allocator.Allocate()
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assert.NoError(t, err)
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assert.NotEmpty(t, id1, "Allocated ID should not be empty")
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id2, err := allocator.Allocate()
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assert.NoError(t, err)
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assert.NotEmpty(t, id2, "Allocated ID should not be empty")
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assert.NotEqual(t, id1, id2, "Allocated IDs should be unique")
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})
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// 測試釋放 ID
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t.Run("Release ID", func(t *testing.T) {
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id, err := allocator.Allocate()
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assert.NoError(t, err)
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err = allocator.Release(id)
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assert.NoError(t, err, "Releasing an allocated ID should succeed")
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// 重新分配應該得到相同的 ID
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newID, err := allocator.Allocate()
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assert.NoError(t, err)
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assert.Equal(t, id, newID, "Reallocated ID should be the same as the released ID")
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})
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// 測試釋放無效的 ID
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t.Run("Release invalid ID", func(t *testing.T) {
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err := allocator.Release("錯誤")
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assert.Error(t, err, "Releasing an invalid ID should return an error")
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})
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// 測試超過位圖容量的情況
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t.Run("Exceed bitmap capacity", func(t *testing.T) {
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// 分配 64 個 ID
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for i := 0; i < 61; i++ {
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_, err := allocator.Allocate()
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assert.NoError(t, err)
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}
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// 第 65 次分配應該返回錯誤
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_, err := allocator.Allocate()
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assert.Error(t, err, "Allocating more than 64 IDs should fail")
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})
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}
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func TestEncodeDecodeIndex(t *testing.T) {
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t.Run("Encode and Decode", func(t *testing.T) {
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for i := 0; i < 64; i++ {
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encoded := encodeIndex(i)
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decoded, err := decodeIndex(encoded)
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assert.NoError(t, err)
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assert.Equal(t, i, decoded, "Decoded index should match the original")
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}
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})
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t.Run("Decode invalid string", func(t *testing.T) {
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_, err := decodeIndex("不可以")
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assert.Error(t, err, "Decoding an invalid ID should return an error")
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})
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}
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@ -1,6 +1,7 @@
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package svc
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import (
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"context"
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"github.com/zeromicro/go-zero/core/stores/cache"
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"github.com/zeromicro/go-zero/core/stores/mon"
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"time"
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@ -30,6 +31,10 @@ func NewServiceContext(c config.Config) *ServiceContext {
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cache.WithNotFoundExpiry(DefaultFindDataNotFoundTimeout),
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},
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})
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_, err := ur.Index20241226001UP(context.Background())
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if err != nil {
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panic(err)
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}
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urlUseCase := uc.MustURLUseCase(uc.URLUseCaseParam{
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URLRepo: ur,
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@ -0,0 +1,111 @@
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## 本地端啟動(測試用)
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[//]: # (請先設定資料庫)
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```bash
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go mod tidy
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# 進入 etc/gateway.yml 設定各依賴的 config
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go run url.go
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```
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### 本地啟動需要依賴套件或工具
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以下已 macOS 為例,若已安裝或有其他可用服務則可跳過
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- go-zero goctl (https://go-zero.dev/docs/tasks/installation/goctl)
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```bash
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$ go install github.com/zeromicro/go-zero/tools/goctl@latest
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```
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- protobuf (https://protobuf.dev/)
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```bash
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brew install protobuf
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```
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## Docker 啟動 (Production)
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```bash
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make build-docker
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make run-docker
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```
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## 目錄結構
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```aiignore
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├── Makefile # 用於構建和運行專案的自動化腳本
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├── etc
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│ └── url.yaml # 服務配置檔,例如端口號、資料庫連線等
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├── generate # 產生服務的目錄
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│ └── api
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│ └── url_generate.api # API 定義檔,描述服務介面和資料結構
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├── go.mod
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├── go.sum
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├── internal # 內部模組目錄,不對外暴露
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│ ├── config
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│ │ └── config.go # 配置管理邏輯,負責加載和解析配置檔
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│ ├── handler
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│ │ ├── routes.go # 路由註冊檔案,將請求分發到對應的處理器
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│ │ └── url
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│ │ └── # URL 相關請求處理器目錄,具體實現短網址的創建、查詢等功能
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│ ├── logic
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│ │ └── url
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│ │ └── # 核心業務邏輯層,實現短網址生成、存儲和讀取
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│ ├── module
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│ │ └── url
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│ │ └── # URL 子模組的實現,封裝功能細節
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│ ├── svc
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│ │ └── service_context.go # 服務上下文,管理全域依賴(如資料庫連線等)
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│ └── types
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│ └── types.go # 通用型別定義,例如請求和回應的結構體
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├── readme.md # 專案說明檔,描述專案目標、使用方法等
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├── url.go # 服務的入口檔案,負責啟動服務
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└── url.json # 服務元數據或範例配置檔,用於輔助開發或測試
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```
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## 設計思路
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|
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IDAllocator 是一個基於 Bitmap的簡單 ID 分配器,用於管理有限數量的 ID。通過位圖來標記 ID 的使用狀態,每個位對應一個唯一的 ID,從而高效地分配和釋放資源。
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### 核心設計理念
|
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1. 使用 math/big 提供的 big.Int 作為位圖,記錄每個 ID 是否已被分配。
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2. 同步安全:通過 sync.Mutex 確保分配和釋放操作的線程安全性。
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3. 編碼與解碼:將位圖中的索引轉換為 URL 友好的短碼(使用 ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_ 作為字符集),以便對外提供友好的短字符串表示。
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|
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### 功能說明
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#### 分配 ID (Allocate)
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* 從位圖中找到第一個未使用的位置,分配對應的 ID。
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* 將該位設為 1 表示已分配,並返回經過編碼的短字符串。
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#### 釋放 ID (Release)
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* 將傳入的 ID 解碼為位圖索引。
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* 將對應位設為 0,表示該 ID 已釋放,可重複使用。
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|
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#### ID 編碼 (encodeIndex)
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* 將位圖索引轉換為固定長度(5 字符)的短碼。 -> **故目前可用會是64 的五次方個(考慮單機架構),已夠用,如果需要分散式可以再討論**
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* 確保生成的 ID 短小且唯一。
|
||||
|
||||
#### ID 解碼 (decodeIndex)
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* 將短碼還原為位圖索引,確保釋放或其他操作可以正確定位。
|
||||
|
||||
|
||||
### 限制與考量
|
||||
1. 前可用會是 64 的五次方個(考慮單機架構),已夠用,如果需要分散式可以再討論
|
||||
2. 目前設計並沒有考慮壞掉重啟,只有讓他不斷插入,在資料庫設定為一所以,插入不了就會在產新的,的消極處理方案
|
||||
如果需求需要重啟復原,可以在討論如何做
|
||||
|
||||
|
||||
|
||||
### 分布式設計考量
|
||||
|
||||
#### 如果需要支持分布式環境,需引入全局一致性和協作管理,可能的改進方向包括:
|
||||
|
||||
1. 集中式位圖管理:
|
||||
* 使用集中式存儲(例如 Redis 或 Zookeeper)存儲位圖數據。
|
||||
* 各實例在分配和釋放時,通過原子操作更新集中位圖。
|
||||
2. 分段分配:
|
||||
* 將 ID 空間劃分為多段,分配給不同的節點,每個節點管理自己的位圖。
|
||||
* 節點之間通過協議(如 Raft)協作管理段的分配。
|
||||
3. 雪花算法(Snowflake Algorithm):
|
||||
* 基於時間戳、機器 ID 和序列號生成全局唯一的 ID。
|
||||
* 適用於大規模分布式系統。
|
||||
|
||||
時間尚短,測試先只做最基本的short_code_utils
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Reference in New Issue